Hi to all, I new on this forum and I have some problems with my single 660 big bore yamaha mt 03 2006 without O2 sensor. I have on it akrapovic exhaust.
First problem: with db killers on idle speed is very unstable 1500-1800rpm. Without db killers is stable at ~1500rpm. Why? Second and big problem is engine die when I try to move with 1st gear and I accelerate a little bit, is like fuel stop. Third problem is if my bike is in neutral position and I accelerate at 3000rpm when I try to give a little bit gas my engine go down at 2900~rpm and with a little bit gas start to go up at 4000-4500rpm. All of this because exhaust is Akrapovic? Or I need kev mod to install or power commander?
Thanks Guys.